package com.itheima.reggie.fliter;

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/*")
@Slf4j
public class LoginCheckFilter implements Filter{

    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;

        String requestURI = request.getRequestURI();
        String [] urls=new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"

        };

        boolean check = check(urls, requestURI);

        if(check)
        {
            log.info("直接放行");
            filterChain.doFilter(request,response);
            return;

        }
        if(request.getSession().getAttribute("employee")!=null)
        {
            log.info("已登录，放行");

            Long empId= (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);
            filterChain.doFilter(request,response);
            return;
        }

        //判断手机端用户登录状态，如果一登陆，直接放行
        if(request.getSession().getAttribute("user")!=null)
        {
            log.info("用户已登录");
            Long userId= (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);
            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        //5、如果未登录则返回未登录结果，通过输出流方式向客户端页面响应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;


    }

    public boolean check(String [] urls,String requestURI)
    {
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match)
            {
                return true;
            }


        }
        return false;
    }
}
